chemical change
XII
A property of that element. An unstable element. A radioactive element
[object Object]
Potassium is a chemical element.
Aluminium is an element . it is not compound or mixture.
Gold is an element
The whole is speculation. The element is fleeting and totally without proper designation.
Chemical symbol
Neither. Nitrogen is classified as an element with no family designation.
I only need to know the one or two letter designation used to represent the name of an element
No, It is silver metal, an element , single Ag is an atom.
HR is a designation for some eyepieces for telescopes. It stands for High Resolution. Some manufacturers market these 6 element eyepieces as planetary eyepieces because if their long eye relief. Be wary of this designation. I have also seen it used in the cheapest 2 and 3 element eyepieces that come with "department store" telescopes.
designation
Isotopesare variants of atoms of a particular chemical element, which have differing numbers of neutrons. Atoms of a particular element by definition must contain the same number of protons but may have a distinct number of neutrons which differs from atom to atom, without changing the designation of the atom as a particular element.
designation
re-designation letter
Ferric chloride is the old designation here. Iron (III) chloride is the IUPAC designation and the modern designation.